用回收水泥稳定压缩土块的能源消耗和碳排放
Alessandra Ranesi1, Ricardo Cruz1, Vitor Sousa1
1CERIS, Department of Civil Engineering, Architecture and Environment, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal.
Materials (Basel, Switzerland)
|September 13, 2025
概括
来自混凝土废弃物的再生水泥 (RCC) 为稳定地面建筑材料提供了一个可持续的替代方案. 这项研究发现,与普通波特兰水泥 (OPC) 相比,RCC显著减少了能源和碳排放.
科学领域:
- 可持续材料科学科学 可持续材料科学
- 土木工程 土木工程是指土木工程.
- 环境科学 环境科学
背景情况:
- 地球建筑正在获得可持续性的引力,但需要化学稳定才能抵抗水.
- 回收混凝土废弃物 (RCC) 是一个有希望的可持续替代普通波特兰水泥 (OPC) 用于土壤稳定.
- 在土壤建筑中使用RCC对环境的影响仍然在很大程度上未被评估.
研究的目的:
- 估计用RCC稳定压缩土块 (CEB) 的能源和碳排放,作为部分或全部替代OPC.
- 通过使用摇篮到门的方法,将与RCC稳定的CEB与OPC的环境影响进行比较.
- 为了评估对CEB压力强度进行规范化的环境性能.
主要方法:
- 使用了一种混合模型,将收集的数据和直接模拟结合起来.
- 每个CEB单位的能源和碳排放情况评估了四种运行情景.
- 环境影响正常化为CEBs的压力强度.
主要成果:
- 与不稳定的CEB (UCEB) 相比,普通波特兰水泥 (OPC) CEB的能源消耗 (高达9倍) 和碳排放 (高达35倍) 显著增加.
- 将OPC替换为RCC可以减少高达8%的能源消耗和高达64%的碳排放.
- 虽然RCC CEB具有较低的机械强度,但它们的碳排放量仍然比OPC CEB低48%,即使强度正常化.
结论:
- 回收混凝土废弃物 (RCC) 是比普通波特兰水泥 (OPC) 更可持续的替代品,用于稳定土结构.
- RCC 稳定可以提高不稳定的 CEB (UCEB) 的机械强度和耐用性.
- 与OPC相比,在CEB中使用RCC可以大幅减少能源消耗和碳足迹.
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